Railway-truck side frame.



H. E. DOERR.

RAILWAY TRUCK'SIDE FRAME. APPLICATION FILED SEPT. 20. 1911.

Patented Jan. 28, 1919.

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RAILWAY TRUCK SIDE FRAME. APPLICATION FILERD sEPLzb. 1911.

1,292,727. Patented Jan. 28, 1919.

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UNrrED STATES PATENT oruuon.

HARRY E. DOERR, OF ST. LOUIS, MISSOURI, ASSIGNOR TO SCULLIN' STEEL 00., OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

RAILWAY-TRUCK SIDE FRAME.

Application filed. September 20, 1917.

To all whom it may concern:

Be it known that I, HARRY E. DOERR, a citizen of the United States, and resident of St. Louis, in the county of St. Louis and State of Missouri, have invented certain new and useful Improvements in Railway-Truck Side Frames, of which the following is a specification. I

This invention relates to railway truck side frames.

One of the objects of the invention is to make the side frames of a truck flexible to facilitate rounding a curved track.

Another object of the invention is to provide a flexible truck side frame adapted to meet the various requirements for successful commercial use.

Generally speaking, these and other obj cots are accomplished by providing a truck side frame comprising a plurality of operatively connected members capable of relative movement with respect to each other to facilitate rounding a curve.

The invention is illustrated on the accompanying sheet of drawings, in which,

Figure 1 is a side elevation of my truck side frame;

Fig. 2 is a plan view of the same with the combination spring cap and bearing plate removed;

Fig. 3 is a detail plan view of the combination spring cap and bearing plate showing its operatlve guiding connection with the side frame proper, and

Fig. 4 is a sectional view taken in the plane of line 4& of Fig. 1.

The various novel features of my invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims.

By referring to the figures of the drawings, it will be noted that I have disclosed a type of truck in which there are two pivot points for each truck, each of said pivot points being in the middle of each side frame and at the top thereof. In view of the fact that the two side frames of the truck are alike, only one of the side frames is shown. In this type of truck the use of truck and body bolsters is obviated. This type of truck heretofore has not been entirely satisfactory, for the reason that the truck would not take a curve properly. To overcome this difliculty I have provided a flexible side frame.

Specification of Letters Patent.

Patented Jan. 28, 1919.

Serial No. 192,288.

This flexible side frame comprises two members 10 and 11, which are pivotally connected at their inner ends by a hollow pin 15 which forms one wall for a nest of four springs 16, to be referred to later. The other side frame member 11 has a convex portion 18 and a concave portion 19 which respectively cooperates with the concave portion 13 and convex portion 17 of the other side frame member 10. It is apparent, therefore, that the side frame members 10 and 11 are free to pivot relatively with respect to each other on the connecting pin 12 to facilitate rounding a curve. To limit the extent of pivotal movement, I have provided projections 20 and 21 on the side frame member 11 which respectively cooperate with the shoulders 14: and 15 on the other side frame member 10. The side frame member 11 has a horizontally extending fioor portion 22 for receiving a spring plate 28, and also has a vertically extending shoulder 24: opposite the shoulder 15 of member 10 to form another wall for the nest of springs 16. Mounted over the nest of springs 16 is a spring cap 25 having a bearing portion 26 for the reception of a cooperating bearing member which is mounted on the car body, not shown. This spring cap 25 at opposite sides has guideways 27 and 28 which respectively cooperate with the shoulder portions 15 and 241. This combined sprin cap and bearing plate 25, which is located between the shoulders 15 and 24: of the side frame members 10 and 11, cooperates with said shoulders to resist pulling and buffing strains which otherwise would be taken by the pin 12 forming the pivotal connection between members 10 and 11. A relatively long pin 29 passes downwardly through a central opening 30 in the spring cap 26 and through the hollow pin 12,

rounding a curve.

a key 31 being passed through the lower end i of the pin 29 to retain the same in proper position. A transversely extending bar 32 connects the two side frames of the truck. Each of the members 10 and 11 on opposite sides of the pivotal connection therebetween is provided with a receiving portion for axle bearing boxes, not shown. Normally the members 10 and 11 of the side frame are in longitudinal alinement with each other, as for instance, when a straight track is being traversed. However, when rounding a curve the members 10 and 11 move or swing laterally with respect toeach other to assist in rounding a curve, and as stated before, this relative pivotal movement between the members 10 and 11 is limited by a cooperation between the shoulders 14 and 15 on the member 10 and projections 20 and 21 on theother side frame member 11.

By means of this arrangement a flexible side frame is provided whereby rounding a curve is greatly facilitated. Furthermore, by making the side frame in two smaller pieces instead of one large piece, shrinkage strains are overcome to a marked degree.

It is evident that there may be various modifications of the invention herein particularly shown and described, and it is my intention to cover all such modifications which do not depart from the spirit and scope of the invention as set forth in the following claims.

I claim:

1. A truck side frame, comprising a plurality of members directly connected to each other at their inner ends and capable of relative sidewise movement with respect to each other to facilitate rounding a curve.

2. A truck side frame, comprising a plurality of members pivotally connected to each other on a centrally located common center and being capable of relative side- Wise movement. 7

'3. A truck side frame, comprising a plurality of normally alined members, and means for connecting said members on a centrally located common center whereby they will move sidewise relative to each other in 4:. A truck side frame, comprising complementary members each having concave and convex portions connected for a relative swinging movement.

5. A truck side frame, comprising a plurality of relatively sidewise movable mem bers, and means for limiting their relative movement.

6. Atruck side frame, comprising a pluralit'y of pivotally connected members, and means for limiting their relative sidewise pivotal movement.

7. A truck side frame, comprising a plurality of members having complementary end portions each having concave and convex parts connected to each other for a relative pivotal movement.

8. A truck side frame, comprising a plurality of movably connected members, and means associated with said members to take pulling and bufling strains from the connection between said members.

9. A truck side frame, comprising a plurality of pivotally connected members-having shoulder portions, and means extending between said shoulder portions to take pulling and bufiing strains fromthe pivotal connection between sald members.

10. A truck side frame, comprising a plurality of pivotally connected members having shoulder. portions, and a spring cap eX- tending between said shoulder portions to take pulling and buffing strains from the pivotal connection between said members.

11. A truck side frame, comprising a pinrality of relatively movable members having shoulder portions, a hollow pin pivotally connecting said members, a spring mounted between said shoulder portions, a spring cap mounted over said spring, and a pin operatively connected to said spring cap and extending through said hollow pin, the spring cap extending between said shoulder portions to take pulling and buffing strains from the pin forming the pivotal connection between said members.

Signed at city of St. Louis, State of Missouri, this 15th day of September, A. D.

HARRY E. DOERR.

Copies of this patent may be obtained for five cents each, by'addressing the Commissioner of Patents, Washington, D. C. 

